Wheel.



l. V. PUGH & F. POUNTNEY.

WHEEL. Y v APPLKCATION FILED DEC-19| 1910.

Patented Aug. 3, 1915.

2 SHEETS-SHEET 1.

JL V PUGH F. POUNTNEY.

WHEEL.

APPLICATION FILED DEc.19..191o.

Patented Aug. 3, 1915.

2 SHEETS-SHEET 2.

auf. Zd

" of Great Britain and jGuiting House, Allesley, Coventry, in the A county of iVarwick,

gli@

Engl and, respectively, Stain" new and useful fill',`

.4f and 5 represent a modification in miran srarns rafrnnr onirica,

JOHN' VERNN PUG-H .AND FRANK PUNTNEY, 0F COVENTRY, ENGLAND.

WHEEL.

intensa@ To @ZZ 'wwm t may concern:

. vlie it known that we,`,JoHN VERNON Puerr and FRANK Ponnrnnv, subjects of the King Ireland, `residing at England, and 2 Barras the county of VVarwiclr,

have invented cerlmproveinents in steels, of'which the following .is a specifie cation.

This invention relates to detachable wheels for motor vehicles, and the like.

The object of the present invention is to provide a detachable wheel of improved and cheaper construction which shall be durable in' all its parts.

The `invention consistsin a vdetachable lane. Coventry, in

wheel forv motor vehicles and the like havv ing an outer hub part and an inner hub part in which the ready withdrawal and replacement ofthe outer hub part od and on the inner hub part is e'ected b'y a single screw thread connection between the two hub parts, the thread carried by the outer part being formed directlyinssaid hub part or upon a member 'rigidly fixed thereto'and that of the inner hub part being formed upon .a member capable of rotary but not longitudinal .movement relative to this inner hub part.

The invention also consists 1n the various forms of detachable wheels of the above type as hereinafter indicated. l

Referring now lto the accompanying drawings r--Figures l and 2 represent one forni fdetachable wheel according to the present invention while, Figs. 3 and 3 represent a modilied'form of the saine. Figs. which the attaching thread is of buttress form. 'In carrying the invention into effect the wheel is provided with an outer hub part, a, and an inner hub4 part, b, the latter being mounted on ball bearings, as shown, or directly on the axle inany usual manner, the drive being transmitted from the inner hub part, I), to the outerhub part, a, by longitudinally positioned dogs or serrations, fc.

The drawing of the outer wheel part on )or oil the inner hub part, 6, is eiiected by a screw thread, d, of large pitch formed in the interior surface of the outer hub part a, or in an inner attachment, @,as shown in Fig. l," this threadbeing adapted to engage with a thread of corresponding pitch formed on mn- Speciicationof Letters Patent.

l Appleation'led December 19, 1910. Serial No.

hub part or wheel is as a member, f, carried by theinner hub part, Zi. This member, f, is cylindrical inl shape and has. a flange, g, provided in its interior surface and extending around the whole or part of the circumference thereof.

A cylindrical member, screwed into the interior of the inner hub part, b, has an outwardly projecting lip, z', around its outer end between which and the end of the inner hub part the flange, g, of the screwed men1- ber, f, is retained, thus allowing this meinber to rotate relatively to the inner hub part, b, but not to .move longitudinally relatively thereto. Thisconstruction is plainly shown in Fig. 1.

In order to prevent loosening of the outer hub part when in position on part means may be provided tolock the screwed member to the outer hub part whereby relative rotary movement of these two parts which would act outer hub part is not permitted. d

A convenient locking engagement for the forms'shown in Figs. l and 2 consists in ar-y ranging projecting parts on the member, f, which. parts may take the form of screws, j, or be formed integral therewith and of any convenient section, and providing a cap, Ze, having correspondingly shaped vholes or slots, m, therein into which these screws, y', are adapted to extend. The cap, 7c, is formed dish-shaped inward of a f0rinnconvenient to allow Aof its being rotated by a key, brace or the like shaped opening, g, shown in Fig. 2 and further is provided with ratchet teeth, n, around its periphery capable of engagement with similar teeth, o, formed in a part of the outer hub member, a. The cap,v='c, is held in engagement with the outer' hub" part by a spring, p, or the like and in such a locked position it will be seen that the thread carrying member, f, cannot rotateI relatively to the outer hub part, a. Any convenient means may be provided. to .rel tain ythe cap, c, on theinner hub part, b, when the outer hub part a, is removed. InI the present modification this is effectedby the heads ofthe' screws, j, which fit into the countersunk holes in the cap, it.

The operation of withdrawing the outer tollows:-The key or brace adapted to. rotate the cap, i, is in serted in the. opening, g, provided in. the cap for this purpose and the 'cap is then the inner hub @Patented fitug., 3, 1935.5, i

to withdraw the p such as the square* cap, t, as shown, orion a part pressed inward against the action of the Spring? 79a' teeth, n, from the teeth, o, on part, a. The cap 7c, can now be freely turned and this causes the rotation of the thread carrying member, f, relative to the inner hub part, Zi, and since this member, f, is only capable of rotation, the outer hub part, a, is caused to move longitudinally off the inner hub part, b, until the wheel becomes disengaged from the latter.

It will be seen that the method of rotatably mounting the thread carrying member, f, so that it cannot move longitudinally relative to the inner hub part, Z), may be moditied, for instance as shown i Figs. 3 and Ba, the latter being a partsection on line A A of the former, grooves, z", may beformed in this menrber, j", and ir the inner hub part,

Y), and a compressible ring, s, or the like placed within. both grooves. A cylindrical partr l0,""pro'jectine` from the member, f is pr'oi'ided with a screw thread to carry the circular nut 11, wide slotsare also formed therein to receive the cap,- lc, which in this case is divided into four arms each provide at their ends with teeth n to engage the teeth, o, carried on vthe en part. shown and and 2 are indicated by similar letters.

In' order to enable access to be had to the interior of the inner hub part, b, and also for the purpose of allowing lubrication to be effected without removing the outer hub part and therefore while the vehicle or car is properly supported by its wheels, the modication shown in Figs. 4 and 5 may be adopted. The end of the inner hub part, b, is reduced in diameter and screwed externally to receive a suitable cap, t, this thread being of comparatively fine pitch and preferably left-handed. The screwed member, f is provided as before described with regard to Figs. l

with an internal flange, g, extending around the whole of its inner surface or at intervals being retained in the groove or channel between the end of the cap, t, and the shoulder, u, formed by the reduction in diameter of the inner hub part, I), thus as before allowing rotary but not longitudinal movement of this screwed member, f, relative to the inner hub part,v b. The thread, d, by which this screwed member, f, engages with the outer hub part, a, is of the same hand but of much larger pitchthan that bywhich the cap, t, is screwed on to the inner hub part, l, and is preferably, as shown, o f buttress formation. Ratchet teeth, o, are formed on the external surface ofthe of either-the outer or inner hub parts with which teeth one or more pawls, fw, carried by the screwed member,v f, are adapted to engage vfor the thereof, this flange thereby disengaging the cap the outer hub of the outer hub` Parts in this figure similar to those reference the cap' piece usual means,

cap, t, when the ratchet teeth, fu, are formed therein. The outer hub part, a, is drawnof the inner hub part, b, by disen gaging the pawl or pawls w, from th ratchet teeth, c, and then rotating tim screwed member, f, in one direction, viz., to the left or anticlockwise when left handed threads are employed. Rotation of the screwed member, f, in the other direct-ion causes the outer hub-part, a, to be drawn onto the inner hub part, Z), the pawls, w, overrunning the ratchet teeth, fr, during this movement, and locking the outer-hub part, a., against loosening when in position.

Means such as recesses or the like are provided for rotating the screwed member, f, and any suitable form of Spanner which will disenga'ge the pawl, fw, from the teeth fu, when in position .for unscrewing said member and leave the pawl free to overrun the teeth when in position for screwing it up may be employed.

When 4the ratchet teeth, fu, are formed in the cap, t, itself, as shown, this cap, t, can be removed from the inner hub part, b, 'after the pawl, fw, have been disengaged therefrom; on being screwed in itl overruns pawls and is locked in position thereby. One or more grub screws, cotter pins or the like may be provided tion of the cap which outer hub was being put on if a very strong spring was used to press on the pawls and was not screwed on very Accidental loosening of the outer hub, a, by the rotation'of the screwed member, f, in a direction to withdraw itself from the outer hub part and in so doing taking the cap, t with it, which might even allow the wheel to come entirely ofi', is prevented by the dilference in pitch of the thread on the screwed member and that on the cap.

The pawl or pawls, tu, are preferably provided with means, as shown, to indicate when they are in engagement with the cap ratchet teeth,` fe. l

Although in these drawings non-driving wheels are illustrated, it must be understood that in the case of driving wheels, the drive is transmitted to the 'inner hub part by means of a live axle, chain wheel or other and vfurther that the brake drum when one is ttedis mounted either on the inner hub part or on the detachable wheel. ln such cases the connection between the two hubA parts may be arranged between this chain wheeler brake drum and the outer hub part, arranged in any desired or convenientman.l ner.

It will be seen'that many modificati ens tightly.

this connection being:

. effect without in any may be made in carrying the invention into way departing from the Yspirit of the same.

Having now' described our invention what '-We claim as new and desire `to secure by Letters Patent is 1. In combination in a detachable wheel for` vehicles, apermanent inner and a removable outer 'hub part, a cylindrical surface having a concentric groove formed on sald inner hub part, a-screw-threaded securing device accurately fitting and rotatable on said surface, a ring extending internally from said securing device rotatably vengaging in said gigroove'7 and an internal-screw thread in saidouter hub Ipart which is en` gaged by saidseeuring device.

2! In combinationain a detachable wheel for vehicles, a permanent inner and a removable outer hub part, an extended cylindrical surface having -a concentric groove formed on said inner hub part, a securing *device accurately fitting and rotatable on 2S said surface, an internal collar in said securing device engaging said groove, an outwardly pointing conical abutment surface at the inside end of the permanenthub part, buttre'ss screw 'threads covering the external surface of 4said securing device and arranged to constitute inwardly pointing approximately conical abutment surfaces, and

' internal surfaces in.the outer'hub ,part to engage said abutment and screw thread surfaces whereby said outer hub part is firmly part, an outwardly pointing conical abutment surface at the inside end of the permanent hub part, buttress screw threads covering the external surface of said securing device and arranged to constitute inwardly pointing approximately conical abutment surfaces and internal surfacesin the outer hub part to engage said abutment and screw thread surfaces whereby said outer hub part is firmly supported 'and' centered by surfaces of large area.

4. In combination in a detachable wheel for vehicles, a permanent inner and a removable outer hub part, an outwardly pointing conical abutment surface at the inside end of the permanent hub part, a securing device having buttress screw thi'eads inclinedoppositely to said conical abutment retained upon lsaid inner .hub part, and internal surfaces'in said outer hub part to en'- gage said abutment and said screw thread surfaces whereby said outer hub part is ,firmly supported and centered byinclined surfaces of large area.v y

In testimony whereof, we aiix our signatures in presence of two witnesses.

JOHN VERNON PUGH. FRANK POUNTNEY. Witnesses:

ALBERT BROWN, JOHN RAVEN.

tlopies of this patent may be obtained for ve cents each, by addressing the Gommissioner o! Patents.

` Washington, ID. C. 

